标题： 带有位移变换的多体本征态的构建 显示英文标题

标题： Construction of Many-Body Eigenstates with Displacement Transformations

摘要： 超越高斯近似的多体本征态可以表示为局部守恒量（IOM）的积分，尽管它们的实际计算直到现在仍是一个艰巨的任务。 我们提出了一种基于位移变换的新颖的IOM计算方法。 这是一种通用且系统的方法，可用于将哈特里-福克和组态相互作用理论扩展到更高阶。 我们的方法结合了参考态的能量和能量方差的最小化与精确对角化。 我们证明，我们的实现能够对相对较大的系统进行高精度的基态计算。 由于它跟踪形成参考态的IOM，因此在处理激发态时特别高效，既在准确性方面，又在可构建的不同状态数量方面。 显示英文摘要

摘要： Many-body eigenstates beyond the gaussian approximation can be constructed in terms of local integrals of motion (IOM), although their actual computation has been until now a daunting task. We present a new practical computation of IOMS based on displacement transformations. It represents a general and systematic way to extend Hartree-Fock and configuration interaction theories to higher order. Our method combines minimization of energy and energy variance of a reference state with exact diagonalization. We show that our implementation is able to perform ground state calculations with high precision for relatively large systems. Since it keeps track of the IMO's forming a reference state, our method is particularly efficient dealing with excited states, both in accuracy and the number of different states that can be constructed.